'Gran Turismo 5' online patch on Saturday

Studio head Kazunori Yamauchi told Eurogamer that the update will limit what cans can be used in online multiplayer.

"We received a lot of demands for having more regulations placed on the online play. We're going to perform an update on the 27th that will include things like max power restrictions and weight restrictions," he said.

Yamauchi said the game was a "living creature, dynamically growing as we speak" and plans to update it "every week, every month" to improve the game.

He also commented on the single-player lag caused by high levels of online users at launch, admitting that it was in "a critical state".

"The data center was set up to handle 500,000 connections but the number of connections we received greatly exceeded that amount and there was a high chance of experiencing problems as a result.

"The design of the GT game really integrates the online and offline parts. So the problems online actually affected the offline play as well.

"Right now we've changed the number of simultaneous connections that are possible to one million, doubling the number, and we're trying to gauge what will happen, but we don't know at this point in time."